Shiee



(No Model.)

C. L. RIDGWAY.

HEATING sTovB 0R PURNAGB.

Patented Oct. 16, 1888.

g1/wanton,

UNTTED STATES PATENT OFFICE.

CHARLES L. RIDGXVAY, OF BOSTON, MASSACHUSETTS, ASSIGNOR. TO TIIE RIDGVAY FURNAOE AND STOVE COMPANY, OF NASHUA, NE\V HAMP- SHIRE.

HEATING STOVE OR FURNACE.

SPECIFICATION forming part of Letters Patent No. 391,274, dated October 16, 1888.

Application tiled July 27,1835.

['0 all whom, it may concern:

Be it known that I, Cr-IARLEs L. RIDGWAY, of Boston, in the county ot' Suffolk and Stale ofMassachusetts,a citizen of the United States,

have invented a new and useful Improvement in Heating Stoves or Furnaces, of which the following is full, clear, aul exict description, reference being had to the accompanying drawings, forming a part of this specificaro tion, in explaining its nature.

Theinvention is an improvement upon that which is described in my patent, No. 281,795, dated July 2st, 1883. In the said patcutIhave described a basket or open tire-pot wall contained within a chamber connected with the combustion-chamber and forming a part thereof, which wall is adapted to bc revolved, and which is surrounded by aparlition-plate forniing the division between the asli-pit chamber 2o and this downward extension to the combustion-chamber. In the present invention the flrepot wall is of a similar form to that described in my said patent iu that it has vertical openings; but it differs therefrom in that it is stationary, and in that the plate which surrounds its lower edge is arranged to be .revolved to transfer the ashes which falloutward through the openings of the fire-potwall thereon to a place from which they can be pre- 3o cipit-ated into the ash-pit.

The invention relates also to various details of construction, all of which will hereinafter be fully described.

In the drawings, Figure 1 is acentral vertical section of a portion ol a furnace having my improvements. Fig. 2 is ahorizontal sect-ion taken through the combustion-chamberin a line above the top of the fire-pot and representing in plan the parts below such line. Fig.

4o 3 is a view in perspective, enlarged, of the grate, the revolving plate, and other parts to which reference is hereinafter made.

A is the ash-pit; B, the lre-pot; C, the combustionfehamber, D, the irepot wall; d, the

t5 portion of the combustiouchaznber about the fire-pot; d', the inner easing of the furnace, which incloses the ceinbustion-chamber and forms, in connection with the lire-pot and its attachments, the chamber d,- clz, the outer cas- Serial No. 172,150. (No modul.)

ing ofthe furnace, and D the heating or hot- 5o air chamber of the furnace.

The firepot wall as here represented is similar in construction to that described in my application for Letters Patent of the United States filed July 27, 1S85, Serial No. 172,751, 55 the tire-pot being` supported Within the chamber d by means ofbrackets or supports d,which extend inward from the casing d', and are fastened to the upper edge of the fire-pot wall. For the purposes of this invention, however, 6o the means described for suspending the firepot wall are not essential, as various other means for effecting such suspension may be employed, and it Will be understood that I do not herein claim the suspending mechanism above referred to.

Extending about the lower extremity of the lirepot wall is the plate F, which in its upper surface and inner periphery is provided with a continuous recess, f, to receive the lower 7o edge ofthe fire-pot wall. rThe plate F is snstained by autifriction rollers or supports f3, which are carried by suitable brackets or l1old ers` f", which extend inward from the wall I ofthe ash-pit chamber. The plate F has cogs or teeth f* upon its under surface,and it should be made to lit the space between the lower edge ofthe lirepot wall and the inner casing of the furnace as snugly as possible, in order to prevent air Afrom entering the chamber d too 8o freely, as it is desirable that very little,if any, air be allowed to enter this chamber directly from the aslrpit chamber.

Arranged below the plate F in the ash-pit chamber is the pinion G, which is mounted S5 upon the. shaft g, and is arranged to engage with the teeth or cogsf of the plate F. The shaft is supported in suitable bearings in a 4fixed part of the furnace, and its outer end extends without the furnace, and is adapted 9o to receive a crank or a chain,(both not showin) the former being applied upon the squared end g and the latter upon the pinion g2 of the shaft. The plate F also supports the grate I-I,

which is provided with pivots or trunnions h2, which rest in recesses in horizontal ledges h at the lower ends of brackets h3, which, as best seen in Fig. 3, depend from said plate F, so

that upon the revolution of such plate the grate also is caused to be revolved. The grate is'also adapted to be tilted or dumped, turning upon its pivots to discharge its contents wholly or in part. When in its ordinary hori- 'zontal position,it is additionally supported by to provide a sufficient lateral opening for the removal of clinkers or for the slicing of the fire, as it is sometimes called.

It will be seen that by making the tire-pot wall stationary and the grate revoluble there is exerted upon the contents of the fuel-cham beratorsionalorgrindingacton,which quickly breaksA up clinkcrs and other foreign sub stances, and causes all the finer portions of the same', together with the ashes resulting from combustion, to be rapidly discharged. It will also be noted that as the burning fuel rests upon the grate it is to a certain extent revolved with it, and that ashes are caused to be discharged from the lire-pot through interstices in the u alls thereof and upon the upper surface of the plate F.

The vertical spaces or interstices of the tirepot wall may be of any desired length and arrangement-that is, they may extend from the top ofthe lire-pot wall to the bottom thereof,

. as represented in Fig. l, or they may extend only a portion ofthe distance from the upper extremity, the remainder of the fire-pot wall being solid or imperforate.

Although I have incidentally shown and described a chain-pinion upon the exterior end of the operating-shaft, I do not herein broadly claim the same, since it forms an element in the construction described and claimed in application serially numbered 193,579, tiled by me in the United States Patent Office on the 1st day of March, 1886.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. The combination of the stationary firepot Wall D with the revoluble plate F, all substantially as described.

2. The combination of the stationary iire-. pot D, the rotary plate F, and a rotary grate, all substantially as described.

3. The combination of a stationary tire-pot, a rotary plate, F, a grate, and devices connect ing the grate with the plate F, whereby upon the movement of the plate the grate is caused to be revolved, all substantially as described.

The

4. The combination of a trepot, the movable plate F, and an anti-friction support for holding the same, all substantially as described.

5. The combination of a suspended fire-pot wall, the chamber d, the rotary plate F, and the grate H, substantially as described.

6. The combination of the stationary tirepot having side openings, spaces, orinterstices, the chamber d, and a rotary grate, substantially as described.

7. The combination of a stationary tire-pot, a rotary grate-support, and a tilting or tipping grate attached thereto, all substantially as described. v

8. The combination of the stationary tirepot, the rotary plate F, and devices for rotating said plate, adapted to be operated from a point without the furnace, all substantially as described.

9. The combination of the rotary plate F, antiefriction supports, the cogs or teethft, pinion G, and shaft g, all substantially as described.

l0. The combination,with the wall or body, as d', of a combustion-chamber, of supportingbrackets which extend inwardly from such body or wall, anti-friction supports upon the supportingbrackets, a recessed and toothed annular plate upon the anti-friction supports, a grate upon the annular plate, a iire-pot wall or cylinder whichby its upper portion is nonrotatably suspended from the wall or body of the combustion chamber, and which by its lower portion extends into the recess in the annular plate, and an operating-shaft which is supported in a fixed portion of the furnace, and which engages the teeth upon the annular plate, substantially as and for the purposes specified.

1l. vThe combination of a non-revoluble firepot wall which is supported by its upper portion within a combustion-chamber,with a sep- IOS arate and independent revoluble plate which supports a grate, substantially as described.

l2. The combination,with the body or shell of a combustion-chamber, of a fixed lire-pot wall which is suspended from such shell and has close connection therewith, and a revoluble grate supporting plate at the lower extremity of but separate from the lire-pot wall, which also has close connection with and is supported by the wall or shell of the combustion-chamber,whereby an encircling-chamber is formed around the re-pot, substantially as and for the purposes described.

CHARLES L. RIDGVAY. Vtitnesses:

F. F. RAYMOND, 2d, FRED. B. DOLAN. 

